Ostapenko, V. V., and G. S. Finin. “Methods for the Elimination of Unknowns from Systems of Linear Inequalities and Their Applications”. Ukrains’kyi Matematychnyi Zhurnal 53, no. 1 (January 25, 2001): 50–56. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4220.